Optical Grid Elements: Type - Safety System Fiber Grid Element; Application - Beam Emitter or Receiver; Number of Beams - 2; Beam Spacing - 500 mm (19.68"); Protected Height - 500 mm (19.68"); Range - 14.9 m (48.88 ft) Max.; Fiber Length - 15.0 m (49.21 ft); Housing Length - 684 mm (26.92"); Housing Width - 52 mm (2.05"); Fiber Size - 7 mm (0.275") Dia.; Fiber Construction - Integral Polished-End, PVC Coated; Beam Diameter - 25 mm (0.984"); Enclosure Construction - Black Anodized Aluminum Housing, Tempered Glass Window; Enclosure Rating - IEC IP65; Safety Rating - Category 4; Temperature Rating - 0 to 70 deg C (32 to 158 deg F); Control - Controller Not Included; Manufacturer Series - PICO-GUARD